CND Cheat Sheet 2026

The 30 highest-yield CND facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the function of a Security Information and Event Management (SIEM) system? → To monitor, detect, and respond to security incidents by analyzing event data
2. Which incident response phase involves removing malware, closing vulnerabilities, and restoring affected systems to normal operation? → Eradication
3. Which CND control specifically addresses preventing unauthorized software execution on endpoints through policy-based restrictions? → Software Restriction Policies (SRP) or AppLocker
4. When performing forensic disk imaging, which tool creates a bit-for-bit copy and generates an MD5/SHA hash to verify integrity? → dd or dcfldd
5. Which network security measure is used to authenticate users based on their physical characteristics? → Biometric authentication
6. Which Windows artifact is most useful for determining which programs were recently executed on a system? → Prefetch files
7. Why is multi-factor authentication (MFA) important for protecting endpoint access? → It ensures an attacker with stolen credentials alone cannot log in
8. What is the primary function of a Demilitarized Zone (DMZ) in a network? → To provide a secure zone for public-facing services while protecting internal networks
9. Why is regular vulnerability scanning important in network security? → To identify and address vulnerabilities before they are exploited
10. What is the PRIMARY purpose of obtaining CND certification in Certified Network Defender? → To demonstrate verified competency and adherence to professional standards
11. What is the significance of timestamps in log analysis during a forensic investigation? → They establish the sequence and timing of events
12. Which tool is commonly used for capturing and analyzing raw network packets during forensic investigation? → Wireshark
13. What does the concept of containment refer to during an incident response? → To limit the spread of the incident, minimizing further damage
14. What does a next-generation firewall (NGFW) provide that a traditional stateful firewall does not? → Deep packet inspection and application awareness
15. Which GDPR principle requires that personal data be collected only for specified, explicit, and legitimate purposes? → Purpose limitation
16. What is the MOST important leadership quality for a CND certified professional managing a team? → Demonstrating integrity, clear communication, and ability to develop team members
17. Which artifact should an incident responder collect FIRST from a live Windows system before pulling the power? → Contents of RAM (memory dump)
18. Which type of malware analysis runs a suspicious file in an isolated environment to observe its behavior without risking production systems? → Dynamic analysis (sandboxing)
19. How does a risk assessment help with vulnerability management? → By helping prioritize vulnerabilities based on their risk to the organization
20. What is a zero-day vulnerability? → A vulnerability that is exploited immediately upon discovery, without a fix available
21. Which risk analysis method uses expert opinion and descriptive ratings such as 'High,' 'Medium,' and 'Low' rather than numerical values? → Qualitative analysis
22. What is the purpose of Windows Defender Credential Guard? → Isolate and protect NTLM/Kerberos credential hashes in a virtualized container from theft
23. What is the significance of incident response testing? → To test the plan’s effectiveness and make necessary improvements
24. What is the primary function of a Security Information and Event Management (SIEM) system in incident response? → Aggregating and correlating log data from multiple sources to detect incidents
25. Why is it important to establish cybersecurity policies for an organization? → To provide clear rules for securing data and complying with regulations
26. During a penetration test, a tester captures a WPA2 4-way handshake. What is the tester attempting? → Perform an offline dictionary attack against the pre-shared key
27. What is the primary goal of OS hardening in a network defender's role? → Reduce the attack surface by disabling unnecessary services and features
28. What is the PRIMARY benefit of using data-driven decision making in Certified Network Defender management? → It provides objective evidence to support decisions, reduce bias, and track outcomes
29. In Certified Network Defender, what is the PRIMARY purpose of conducting an initial assessment? → To establish a baseline and identify needs for appropriate action
30. What does the term 'chain of custody' mean in the context of network forensics? → Documented handling of evidence from collection to court presentation